Fundamental Operation
Configuring Analog Modulation (PSG-A Series Only)
Chapter 236
Creating a Multipath AM Configuration
Use the following steps to configure a multipath AM configuration. AM Path 1 and AM Path 2
are summed internally for composite modulation. Either path can be switched to any one of
the modulation sources (internal 1 or 2, external 1 or 2), but any given source can only be
routed to one modulation type at a time.
Note that the AM Source for AM Path 1 is set to Internal 1 as a default setting. Therefore, the
AM Source for AM Path 2 must be set to another source, as explained in the following
procedure.
1. Press
AM Path 1 2 to toggle to AM Path 2.
This opens a menu of softkeys where you can define a second unique amplitude
modulation configuration.
2. Press
AM Depth > 40 > %.
The AM Path 2 AM depth is set to 40.0 %, as displayed below the
AM Depth softkey.
3. Press
More (1 of 2) > AM Waveform > Triangle.
The AM Path 2 AM waveform is set to Triangle, as displayed below the
AM Waveform
softkey.
4. Press
More (2 of 2) > AM Source > Internal 2.
The AM Path 2 source is set to Internal 2, as displayed below the
AM Waveform softkey.
The signal generator is now configured to output a 0 dBm, multipath amplitude-modulated
carrier at 15 GHz. AM Path 1 is a sinewave with 90% depth and a 10 kHz rate. AM Path 2 is
a triangle wave with 40% depth and a 400 Hz (default) rate.
Activating a Multipath AM Configuration
Follow these remaining steps to output the amplitude-modulated signal.
1. Press
AM Off On.
This activates the modulation on AM Path 2. The AM annunciator is activated indicating
that you have enabled amplitude modulation on AM Path 2.
2. Press
AM Path 1 2 > Amp Off On.
This toggles back to AM Path 1 and activates the modulation on AM Path 1.
3. Press
RF On/Off.
The RF ON annuciator is activated, indicating that the multipath AM signal is now
available at the RF OUTPUT connector.
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